Cheap Alaska Airlines flights Ontario (ONT) to Washington (IAD)

Scoring cheap one-way Alaska Airlines flights from ONT to IAD on Expedia is a breeze — just filter by “Price (lowest to highest).” Or check out our budget-friendly return fares for your next exciting vacation.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines flights to Washington are usually cheaper in the low-season months of January and February. Whether you’re in search of a round-trip or one-way ticket, you could score a better deal then.

For cheap Alaska Airlines fares from Los Angeles - Ontario Intl. Airport (ONT) to Washington Dulles Intl. Airport (IAD), start searching one to three months before your planned departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also influence the overall price. Sunday is usually the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your journey on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Use the “Nonstop” filter when looking for direct Alaska Airlines flights from ONT to IAD. It’s also a good way to compare other airlines servicing the same nonstop route.

Sort your results by “Morning” and “Early Morning” to find the earliest departures from ONT to IAD. Leaving early means flight cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Get on an Alaska Airlines flight from Los Angeles - Ontario Intl. Airport (ONT) to Washington, and you’ll most likely touch down at Washington Dulles Intl. Airport (IAD). This is the airline’s primary hub in this destination.

Alaska Airlines makes traveling from ONT to IAD enjoyable with a rewarding loyalty program and an excellent in-flight experience. You could even start earning points with Mileage Plan. Remember to join Expedia’s free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future travel.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on the ticket type you purchased, a fee may apply if you cancel or change your flight more than 24 hours after it has been confirmed. To find tickets with more flexibility, select our “Changes included” and “No cancel fee” boxes when looking for flights. For more details on canceling or modifying your reservation, head to “Trips,” select your flight and click on “Manage Booking.”